RF design Schematic related questions and comments

hi,

I am designing smart sensor with i2c, UART and SPI interface and current & voltage measurement.

so which extra circuit is add for current and voltage measurement.

i am using ADC interface for current and voltage measurement.

i am using Load cell one of sensor..so how can it interface with microcontroller?

For current you can use current transformer and to detect the value of current, with help of OP-AMP or HALL sensor connected to ADC

For Voltage you can use potential transformer (which reduces your actual voltage in 1:N ratio, this can used for measuring large voltage values) and for detecting the exact voltage, with OP-AMP, comparator(ADC).

Simply after transformer the voltage can be sensed with ADC, but the actual value should not exceed the reference voltage